•Photo voltaic cells are solar cells that convert the sun’s energy into electricity.
•Solar cells have no moving parts, and they run on nonpolluting power from the sun.
•However, they produce a very small electrical current. Meeting the electricity needs of a small city would require covering hundreds of acres with solar panels.
•Sunlight falls on a semiconductor, causing it to release electrons.
•The electrons flow through a circuit that is complete when another semiconductor in the solar cell absorbs electrons and passes them on to the first semiconductor.
•Solar cells require extended periods of sunshine to produce electricity. This energy is stored in batteries, which supplies electricity when the sun is not shining.
•Currently, solar cells provide energy for more than 1 million households in developing countries, where energy consumption is minimal and electricity distribution networks are limited.
•Solar cells have no moving parts, and they run on nonpolluting power from the sun.
•However, they produce a very small electrical current. Meeting the electricity needs of a small city would require covering hundreds of acres with solar panels.
•Sunlight falls on a semiconductor, causing it to release electrons.
•The electrons flow through a circuit that is complete when another semiconductor in the solar cell absorbs electrons and passes them on to the first semiconductor.
•Solar cells require extended periods of sunshine to produce electricity. This energy is stored in batteries, which supplies electricity when the sun is not shining.
•Currently, solar cells provide energy for more than 1 million households in developing countries, where energy consumption is minimal and electricity distribution networks are limited.
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